[ew] Add basic classes.

webkit/browser/fileapi/isolated_file_system_backend.cc

Index: webkit/browser/fileapi/isolated_file_system_backend.cc
diff --git a/webkit/browser/fileapi/isolated_file_system_backend.cc b/webkit/browser/fileapi/isolated_file_system_backend.cc
index b2aee2b9e660c17a4138aeed6005019b99f6996b..1b5f34624354f4dc29459b911251b534faeea8dc 100644
--- a/webkit/browser/fileapi/isolated_file_system_backend.cc
+++ b/webkit/browser/fileapi/isolated_file_system_backend.cc
@@ -23,6 +23,7 @@
 #include "webkit/browser/fileapi/isolated_context.h"
 #include "webkit/browser/fileapi/native_file_util.h"
 #include "webkit/browser/fileapi/transient_file_util.h"
+#include "webkit/browser/fileapi/watcher_manager.h"
 #include "webkit/common/fileapi/file_system_types.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
@@ -84,6 +85,11 @@ AsyncFileUtil* IsolatedFileSystemBackend::GetAsyncFileUtil(
   return NULL;
 }
 
+WatcherManager* IsolatedFileSystemBackend::GetWatcherManager(
+    FileSystemType type) {
+  return NULL;
+}
+
 CopyOrMoveFileValidatorFactory*
 IsolatedFileSystemBackend::GetCopyOrMoveFileValidatorFactory(
     FileSystemType type, base::File::Error* error_code) {